<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>helloworld</title>
    <script type="text/javascript" src="lib/vue.js"></script>
</head>

<body>
    <div id="box">
        {{10+20}}
        <p>{{myname}}</p>

    </div>

    <script>
        new Vue({
            el: "#box",
            data: {
                myname: 'jiabo'
            }
        })
    </script>

</body>

</html>